2154520000 has 140 divisors (see below), whose sum is σ = 5436241096. Its totient is φ = 846720000.

The previous prime is 2154519979. The next prime is 2154520021. The reversal of 2154520000 is 254512.

It is an interprime number because it is at equal distance from previous prime (2154519979) and next prime (2154520021).

It is a self number, because there is not a number n which added to its sum of digits gives 2154520000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2439559 + ... + 2440441.

Almost surely, 2^2154520000 is an apocalyptic number.

2154520000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2718120548).

2154520000 is an abundant number, since it is smaller than the sum of its proper divisors (3281721096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154520000 is an frugal number, since it uses more digits than its factorization.

2154520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2154520000 is about 46416.8073008043. The cubic root of 2154520000 is about 1291.5667121173.

Adding to 2154520000 its reverse (254512), we get a palindrome (2154774512).

The spelling of 2154520000 in words is "two billion, one hundred fifty-four million, five hundred twenty thousand".